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Subsequent Event	9 Months Ended
Subsequent Event	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Event	Subsequent Event On October 29, 2018, we completed an investment of $10.0 million in WayUp, Inc., a US-based job site and mobile application for college students and recent graduates. Our investment will be accounted for under the cost method and included in other assets on our condensed consolidated balance sheet.